Switching phase separation mode by varying the hydrophobicity of polymer additives in solution-processed semiconducting small-molecule/polymer blends

Zhengran He; Dawen Li; Dale K. Hensley; Adam J. Rondinone; Jihua Chen

doi:10.1063/1.4820588

Switching phase separation mode by varying the hydrophobicity of polymer additives in solution-processed semiconducting small-molecule/polymer blends

Zhengran He, Dawen Li, Dale K. Hensley, Adam J. Rondinone, Jihua Chen

Research output: Contribution to journal › Article › peer-review

72 Scopus citations

Abstract

Lateral and vertical phase separations play critical roles in the performance of the next-generation organic and hybrid electronic devices. A method is demonstrated here to switch between lateral and vertical phase separations in semiconducting 6,13-bis(triisopropylsilylethynyl) pentacene (TIPSE pentacene)/polymer blend films by simply varying the alkyl length of the polyacrylate polymer component. The phase separation modes depend on intermolecular interactions between small molecule TIPSE pentancene and polymer additives. The blend film with a dominant vertical phase separation exhibits a significant enhancement in average mobility and performance consistency of organic thin-film transistors.

Original language	English
Article number	113301
Journal	Applied Physics Letters
Volume	103
Issue number	11
DOIs	https://doi.org/10.1063/1.4820588
State	Published - Sep 9 2013

Funding

This work was supported by National Science Foundation (NSF ECCS-1151140) and the Center for Materials for Information Technology (MINT) at the University of Alabama. A portion of this research was conducted at the Center for Nanophase Materials Sciences, which is sponsored at Oak Ridge National Laboratory by the Division of Scientific User Facilities, Office of Basic Energy Sciences, and U.S. Department of Energy.

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AU - Chen, Jihua

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AB - Lateral and vertical phase separations play critical roles in the performance of the next-generation organic and hybrid electronic devices. A method is demonstrated here to switch between lateral and vertical phase separations in semiconducting 6,13-bis(triisopropylsilylethynyl) pentacene (TIPSE pentacene)/polymer blend films by simply varying the alkyl length of the polyacrylate polymer component. The phase separation modes depend on intermolecular interactions between small molecule TIPSE pentancene and polymer additives. The blend film with a dominant vertical phase separation exhibits a significant enhancement in average mobility and performance consistency of organic thin-film transistors.

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Switching phase separation mode by varying the hydrophobicity of polymer additives in solution-processed semiconducting small-molecule/polymer blends

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